1 / 9

Nitrogen Release Procedures in Cryogenic Solenoid Systems

Learn about safe nitrogen release protocols from the TT2A cryogenic solenoid systems. Follow guidelines to prevent hazards and ensure efficient operation. Explore the LN2 circuit scenarios and ventilation strategies. Presented by A. Fabich from CERN.

avicki
Download Presentation

Nitrogen Release Procedures in Cryogenic Solenoid Systems

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Nitrogen release from the TT2A cryogenic solenoid systems A.Fabich CERN AB-ATB, Switzerland Videoconference, 3rd May 2005 A.Fabich, CERN

  2. LN2 circuit (old) Old scenario • 100 % exhaust to surface/atmosphere P.Titus, MIT A.Fabich, CERN

  3. Restrictions to nitrogen release • NO release of activated LN2 directly to atmosphere • Release of activated nitrogen to TT10 • See memo • Minimize activated LN2 • Remove LN2 previous to beam extraction • <1 liter remaining in cryostat Memo available: at homepage A.Fabich, CERN

  4. LN2 circuit (new) • Additional line to TT10 • Activated LN2 to TT10 • Other to surface A.Fabich, CERN

  5. LN2 circuit (new) Minimum LN2 rests in cryostat • < 1 liter • Activated by proton beam • Not vaporized by solenoid • Mixes with new cooling cycle • Release of ALL LN2 to TT10 • ODH? A.Fabich, CERN

  6. 1 2 4 surface at access shaft to TT2 • nToF11 • Access pit • Control room • TT10 Ventilation shaft A.Fabich, CERN

  7. 1 3 2 4 underground  surface (2) beige/orange = = surface black/blue = = underground • nToF11 • Access pit • Control room • Ventilation shaft Distance 1 to 4 nToF11 to ventilation ~ 120 m (85 m within TT10) ~85 m TT10 p-beam A.Fabich, CERN

  8. 1 4 Ventilation line CERN staff is investigating • best line feed • hole drilling (also for optics) Long path in TT10 • Avoid cold pipe installation • install temporarily some fans to push nitrogen gas through TT10 towards ventilation shaft ~85 m TT10 A.Fabich, CERN

  9. Ventilation performance • Extraction at building 806 • Additionally pushing at BA2 (in SPS) • Ventilation for TT10 and a SPS sector • Max. debit 27000 m3/h • 150 liter LN2 = 1000 m3 • ventilated within 2 minutes = simultaneous to release • Flow in TT10: 0.5 - 1 m/s • Next steps: • contact with safety/cryogenics • confirm safe operation of 100 % release to TT10 A.Fabich, CERN

More Related